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公开(公告)号：US20230112510A1
公开(公告)日：2023-04-13
申请号：US17498974
申请日：2021-10-12
申请人： Target Brands, Inc.
摘要： An apparatus includes a processor, a transceiver connected to the processor, an integrated circuit connected to the processor, a first proximity sensor configured to provide a first sensor input to the integrated circuit, and a second proximity sensor configured to provide a second sensor input to the integrated circuit. When the integrated circuit determines that the first sensor input represents a first detection event, the processor sets a timer and when the timer expires before the integrated circuit determines that the second sensor input represents a second detection event, the processor sends a message through the transceiver.
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公开(公告)号：US11567158B2
公开(公告)日：2023-01-31
申请号：US17006764
申请日：2020-08-28
申请人： SOLiD, Inc.
发明人： Young Man Cho , Yvonne Hee Jun Cho
IPC分类号： G01S1/04 , G01S5/02 , H04B17/318 , H04W16/18 , H04W16/20
摘要： Disclosed is a beacon-based positioning system. A beacon position in which a beacon is installable is defined in a target space, and a path loss model of radio frequency (RF) signals between all beacon positions and all observation positions of a scanner is determined. Among all possible installation plans for the beacon positions, an installation plan in which different beacon signals, whose RSSIs calculated using the path loss model have significant values, are received in a number greater than or equal to a minimum reference number and a total number of the beacons installed is minimum is determined as an optimal installation plan. The optimization problem of determining the optimal installation plan may be expressed by binary linear programming.
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公开(公告)号：US20220413082A1
公开(公告)日：2022-12-29
申请号：US17900480
申请日：2022-08-31
申请人： Cornell University
发明人： Xiaonan Hui , Edwin C. Kan
摘要： A radio-frequency method for range finding includes modulating a reference signal having an intermediate frequency to a downlink signal having a carrier frequency using a clock signal. The downlink signal is transmitted to a tag using a transceiver. An uplink signal backscattered front the tag is received and demodulated using the clock signal. The uplink signal has a frequency that is a harmonic of the carrier frequency. A distance between the tag and the transceiver is calculated based on a phase of the demodulated uplink signal. A system for range finding includes a transceiver and a processor. The transceiver modulates a reference signal to downlink signal and transmits the downlink signal. The transceiver receives and demodulates an uplink signal. The processor is configured to receive the demodulated uplink signal and calculate a distance between the tag and the transceiver using a phase of the demodulated uplink signal.
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4.发明授权公开(公告)号：US11519995B1
公开(公告)日：2022-12-06
申请号：US17692098
申请日：2022-03-10
发明人： Sheng Yong , Rui Zhou , Xiaoyu Liu , Yulong Que
IPC分类号： G01S1/04
摘要： A range-finding method, a apparatus, a terminal system, and a computer-readable storage medium are provided. The range-finding method includes: transmitting a first check code from a transmitting terminal to a receiving terminal by using a first communication technology; transmitting a modulated signal from the transmitting terminal to the receiving terminal by using a second communication technology different from the first communication technology, where the modulated signal carries a second check code; acquiring a first moment at which the modulated signal is transmitted and a second moment at which the modulated signal is received; demodulating the second check code in the modulated signal; acquiring a range-finding confidence according to the first check code and the demodulated second check code; and acquiring a measured distance between the transmitting terminal and the receiving terminal according to the first moment, the second moment, a transmission speed of the modulated signal, and the range-finding confidence.
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公开(公告)号：US20220377701A1
公开(公告)日：2022-11-24
申请号：US17743431
申请日：2022-05-12
发明人： Stephen William Edge , Sven Fischer , Rayman Pon
IPC分类号： H04W64/00 , H04W24/10 , H04B7/08 , G01S5/10 , H04W4/029 , H04B7/0413 , H04B7/0452 , H04B7/0417 , G01S5/02 , G01S1/04 , H04L5/00 , H04L1/02 , H04L1/04 , H04W16/28
摘要： Techniques are provided for positioning of a mobile device in a wireless network using directional positioning reference signals (PRS), also referred to as PRS beamforming. In an example method, a plurality of directional PRSs are generated for at least one cell for a base station, such that each of the plurality of directional PRSs comprises at least one signal characteristic and a direction of transmission, either or both of which may be distinct or unique. The plurality of directional PRSs is transmitted within the at least one cell, such that each of the plurality of directional PRSs is transmitted in the direction of transmission. A mobile device may acquire and measure at least one of the directional PRSs which may be identified using the associated signal characteristic. The measurement may be used to assist position methods such as OTDOA and ECID and to mitigate multipath.
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公开(公告)号：US11510026B2
公开(公告)日：2022-11-22
申请号：US17128139
申请日：2020-12-20
申请人： HERE GLOBAL B.V.
发明人： Pavel Ivanov , Michael Krasniansky
摘要： Disclosed is a radio-visual approach for device localization. In particular, a mobile device may receive, via radio signal(s) emitted by transmitter(s) in a vehicle that is substantially proximate to the mobile device, radio data that represents vehicle information associated with the vehicle, and may then determine or obtain a location of the vehicle in accordance with that vehicle information. Also, the mobile device may capture an image of the vehicle and may use that image as basis for determining a relative location indicating where the mobile device is located relative to the vehicle. Based on the location of the vehicle and on the relative location of the mobile device, the mobile device may then determine a location of the mobile device.
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公开(公告)号：US11496990B2
公开(公告)日：2022-11-08
申请号：US16782119
申请日：2020-02-05
发明人： Stephen William Edge , Sven Fischer , Rayman Pon
IPC分类号： H04W64/00 , H04W24/10 , H04B7/08 , G01S5/10 , H04W4/029 , H04B7/0413 , H04B7/0452 , H04B7/0417 , G01S5/02 , G01S1/04 , H04L5/00 , H04L1/02 , H04L1/04 , H04W16/28 , H04B7/06 , H04W4/02 , H04L1/06 , H04L5/22
摘要： Techniques are provided for positioning of a mobile device in a wireless network using directional positioning reference signals (PRS), also referred to as PRS beamforming. In an example method, a plurality of directional PRSs are generated for at least one cell for a base station, such that each of the plurality of directional PRSs comprises at least one signal characteristic and a direction of transmission, either or both of which may be distinct or unique. The plurality of directional PRSs is transmitted within the at least one cell, such that each of the plurality of directional PRSs is transmitted in the direction of transmission. A mobile device may acquire and measure at least one of the directional PRSs which may be identified using the associated signal characteristic. The measurement may be used to assist position methods such as OTDOA and ECID and to mitigate multipath.
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公开(公告)号：US20220120838A1
公开(公告)日：2022-04-21
申请号：US17447392
申请日：2021-09-10
IPC分类号： G01S1/04
摘要： A method is disclosed. In various examples, the method may include receiving an instruction for generating a ranging signal, and transmitting the ranging signal at least partially responsive to the instruction. In various examples the ranging signal may be transmitted via a terrestrial transmitter for transmitting radio waves having encoded messaging information and timing information for one or more of positioning, navigation and timing. In various examples, the ranging signal may exhibit a first ranging pulse and a second ranging pulse of a pulse group and an encoded transmitter identifier, the transmitter identifier encoded by modulating an inter-pulse interval defined between a start of the first ranging pulse and a start of the second ranging pulse.
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公开(公告)号：US20220075019A1
公开(公告)日：2022-03-10
申请号：US17526680
申请日：2021-11-15
申请人： Kay Nishimoto
发明人： Kay Nishimoto
摘要： Traditional “low-to-high waveform change” timing markers, in navigation or GPS signals, can be easily naturally or maliciously altered and require unshareable, high-resolution, high-capacity channels, often not government available. Whereas, message text format methods include proven error correction, redundancy, encryption, jam-resistance, concealability, spoof-resistance, multiuser, delayable messaging, channel efficiency, and downstream authentication. Herein, “virtual timing markers” exploit message format strengths and more. Because many navigating platforms also communicate voice, messages, or data, platforms and multiuser messages can simultaneously and unintrusively share the same transmission signal, which reduces onboard hardware, needed channel capacity, radio frequencies, costs, and infrastructure. FAA mandated, airliner collision avoidance broadcasts of their GPS location can unintrusively commingle navigation messages with aforementioned strengths as precise derivative GPS timing markers on existing, prolific broadcasts having 1000× greater power levels. “Relayed transmission pathways” can eliminate cumbersome traditional nanosecond synchronization of navigation transmitters or exploit inclusion of happenstance neighborhood transmitters. Additional features.
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10.发明申请公开(公告)号：US20210405143A1
公开(公告)日：2021-12-30
申请号：US17066679
申请日：2020-10-09
申请人： Link Labs, Inc.
发明人： Mark O. Bloechl
摘要： A communications system, including at least one tag and a plurality of beacons. The tags are configured to detect beacon advertisement messages, initiate a connection with at least one of the plurality of and transmit a Constant Tone (CT) to the at least one of the plurality of beacons. The tag is further configured to determine a location thereof based on the sampled CT from both the beacon and the tag and then report the location via the one of the beacons and/or an access point. Phase ranging mitigation techniques which include hop duplication, hop interpolation and ADC DC offset correction are employed so as to provide more accurate ranging values even in the case where there are many other devices in local proximity and which are competing for use of the same RF channels as those used by the tags and beacons.
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